HP 7475a, Operation And Interconnection Manual

Page: 36 / 101

5.
6.
7.
PEN
UfO
B/A3 A/A4
• •
SIZE
Cl
2·18
PLQITER OPERATION
PEN UID
-
Pressing the
PEN UIO
pushbutton
reverses the current pen state (up or down).
It
can be used in conjunction with the cursor
pushbuttons to draw lines or to digitize a
point. When the
PEN UfO
push button is pressed
during program execution, it is equivalent to
executing an HP-GL PU or PD instruction.
BtA3, AlA'
-
These two lights indicate the
currently selected paper size. When the rear­
panel
US/MET
switch is set to
us,
they indicate
A or B paper size, but when the switch is set
to
MET
(metric), they indicate A4 or A3 paper
size.
NOTE:
Since one of the two paper·size lights
is always on, these lights also serve as power­
on indicators. Also note that the current paper­
size light will blink whenever the plotter receives
the HP·GL instruction, DP. This indicates a
point can he digitized using the
ENTER
push button
. •
SIZE
-
Pressing the
SIZE
pushbutton simul­
taneously with the
ENTER
push button selects
the alternate paper size. The following actions
occur each time a new paper size is selected:
a. The size status indicated by the
BtA3
and
AiA4
lights is reversed.
b. The plotter assumes a new piece of paper
is loaded and the pen holder lifts and moves
to the extreme right.
c. The equivalent of executing an Hp·GL DF
instruction establishes default conditions.
d. PI and P2 are set to their default coordi·
nate locations.
e. The input window is set to the new hard-clip
limits.
NOTE:
The state of the rotate function is not
affected
. •